marc a

iTrader: (1)

The engine/pcm are from a 2002 Camaro SS. The wiring diagram for this combo shows the "Generator Turn On Signal" going to pin 15 of the Red harness.

How do I test whether the PCM is in fact turning on the alternator?

How does the PCM decide whether to turn on the alternator or not?

If the PCM is turning on the alternator, how much voltage should be present at the terminal on the back of the alternator.

I am having charging problems and need to understand the "new" technology. The last GM alternator I dealt with had an internal regulator with 3 or 4 wires to deal with.

Thanks in advance.

SOMbitch

iTrader: (8)

I know this is not answering your ????? but it still has an internal regulator. Mine started discharging and that was the problem so I had a rewinding shop rebuild the whole thing except replace the armature for $70 bux. Half the cost of a rebuilt one from AZ, AA etc.....